You are here

Solar Pre-Heating for Textile Dyeing in Hangzhou

Since 2007 the 13,000 m2 flat plate collector field at High Fashion Ltd in the city of Hangzhou in the Chinese province of Zhejiang pre-heats water to 55 °C. The installation is one of the largest solar process heat systems in China and therefore often presented as a successful case study in speeches at international conferences. The pre-heated water is stored in a tank, and then heated to around 100 °C to produce steam for the dyeing of garment. The total investment for the plant was Renminbib (RMB) 14.5 million (around EUR 1.9 million), the estimated pay-back time was 3 to 4 years according to the Chinese Solar Thermal Industry Federation (CSTIF). National ministries supported the environmental action of High Fashion with a funding of 50 RMB/m2 (6.5 EUR/m2).Photo: CSTIF / Sun & Wind Energy